Saturday, 17 March 2012

Gosford-Wyong Desalination Scheme

Gosford-Wyong Desalination Scheme

Why don't we just pack up and and sell them the one from Botany Bay we don't need it ?

Recently found an application  Gosford-Wyong Desalination Scheme, 


Wyong Shire Council (the Proponent) jointly operates the Gosford Wyong Councils’ Water Authority (GWCWA) with Gosford City Council, and is responsible for the operation and management of the Joint Water Supply Scheme (JWSS). The JWSS currently includes a series of water storages, treatment plants and major water transfers systems for the supply of water to residences and commercial and industrial enterprises on the Central Coast.
Since 1993, below average rainfalls have resulted in substantial decreases in water storages which, as at the date of this report, are at approximately 15-16% of total capacity. Reduced water storages have been exacerbated by increased demand for water, driven by significant population growth on the Central Coast. Projections for population growth and the possibility that current drought conditions may continue or worsen in the future have led the GWCWA to develop and release Water Plan 2050, which sets the strategic direction for enhancing and securing water supply in the region. Water Plan 2050 was finalised and released in May 2007. The Plan focuses both on enhancing water supplies and managing demand for water.
The strategy presented in Water Plan 2050 focuses on immediate water supply and demand management measures, including enhancement of existing water supply systems (linking Mardi Dam and Mangrove Creek Dam, and proceeding with the new Tillegra Dam), reduction in demand (including water efficiency standards, education programs, stormwater harvesting and expansion of recycled water use for non-potable uses) and additional short-term water sources (such as groundwater, a new connection with the Hunter Water System, and retrofit of rainwater tanks). The Plan recognises that if the current drought conditions continue, and the regional population grows further, longer-term water supply measures may need to be implemented. These longer-term options include a permanent 20-megalitre per day desalination plant, and possible use of highly-treated effluent as a water source.
The Proponent has sought approval for the permanent desalination plant as a contingency measure, should it be required over the next 45 years to secure reliable water supplies to the Central Coast. The proposed desalination plant would be co-located with the existing Toukley sewage treatment plant. Seawater to supply the plant is proposed to be sourced from under Lakes Beach, with seawater concentrated produced through the reverse osmosis process being discharged to the ocean with the existing treated effluent stream from the sewage treatment plant.
The proposed desalination plant is expected to involve capital investment in the order of $75 million and as such is considered State Significant Development under the then State Environmental Planning Policy (State Significant Development) 2005. The proposed development therefore requires development consent from the Minster for Planning under Part 4 of the Environmental Planning and Assessment Act 1979.
1.1 Description of Proposed Development
The proposed development includes the following components:
  1. a 7,000 megalitre per annum (nominal 20 megalitre per day) reverse osmosis desalination plant located
    on the existing Toukley sewage treatment plant site;
  2. a three or four caisson and horizontal collector well system beneath Lakes Beach with an associated raw
    water pumping station and chlorine dosing facility;
  3. a raw water transfer main to connect Lakes Beach raw water pumping station to the desalination plant;
  4. a pipeline from the desalination plant to Toukley sewage treatment plant to allow discharge of
    approximately 30 megalitres per day of saline reject water via the existing Norah Head ocean outfall; and
  5. a product water pumping station and main connecting to the existing water supply system.
The proposed development involves a capital investment of approximately $75 million and would employ 10 people during operation. Construction of the development is expected to take approximately 21 months. Figure 1 indicates the location of the proposed development and generally configuration of its component parts.